Motherwell & Glasgow Central Protocol Converters - 1985/86
![](http://www.bygonebytes.co.uk/ses/s_Central_905_Tape_Emulator.jpg)
An Interface board was built to form the link between the Z80 and the 905 with ASAD Cards used for serial links to adjacent systems.
![](http://www.bygonebytes.co.uk/ses/85SES4.jpg)
![](http://www.bygonebytes.co.uk/ses/85SES4_905_Z80_Buffer_Card_Pen_Plots.jpg)
The Buffer card design and Pen Plots.
![](http://www.bygonebytes.co.uk/ses/Central_TD_12.jpg)
![](http://www.bygonebytes.co.uk/ses/TDDDVOL1.jpg)
If you click on the photo the rear Co-System can be seen in the left hand rack - unfortunately it's the only photo I have and the 1st Line Manual.
Motherwell-Newton SSI to GEC Elliot 905 Converter - 1990
This interface consisted of a RS422/232 converter, a Control Card and an Interface to the 905 TD MARCH system. This converted the SSI BR1922/A TD stepping data to a format readable for the GEC-Elliot 905.![](http://www.bygonebytes.co.uk/ses/s_90SES1.jpg)
![](http://www.bygonebytes.co.uk/ses/90SES1_SSI-905_Interface_Card.jpg)
![](http://www.bygonebytes.co.uk/ses/MOTHNEWT.jpg)
Sighthill Protocol Converter - 1992
![](http://www.bygonebytes.co.uk/ses/Sighthill_Protocol_Converter.jpg)
We used the Line Routing Card to convert the TD's BR1800 protocol to the SMA's ScR3 protocol.
The manual provides a full description is of how we did the conversion.